A combined detection method for decreasing complexity in mobile communication system

A mobile communication system and joint detection technology, applied in transmission systems, diversity/multi-antenna systems, code division multiplexing systems, etc. The effect of complexity

Inactive Publication Date: 2005-03-16
ZTE CORP
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Problems solved by technology

[0010] The purpose of the present invention is to provide a joint detection method that reduces complexity in a mobile communication system, provides a fast method for joint detection and solution, and overcomes the calculation amount of the existing joint detection and solution technology under the premise of obtaining better performance Big shortcomings, solve the difficult problem of hardware, and meet the real-time requirements of TD-SCDMA system

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  • A combined detection method for decreasing complexity in mobile communication system
  • A combined detection method for decreasing complexity in mobile communication system
  • A combined detection method for decreasing complexity in mobile communication system

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Embodiment Construction

[0028] The implementation of the technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings:

[0029] The core idea of ​​the present invention is that according to the block characteristics of the TD-SCDMA system matrix A, the blocks along the diagonal and the sub-diagonal are the same, and only the small matrix formed by these blocks is inverted to represent the matrix A The inverse of , and then sliding filtering on the received data, the sent data can be solved.

[0030] The following is a further detailed description of the method of the present invention.

[0031] According to the joint detection data model, see reference [1], for a MIMO system with K users, the receiving antenna array at the base station has M elements, then the system matrix A is composed of the same block V, as figure 1 shown.

[0032] The user's joint channel impulse response vector b(k), that is, the vector formed by the convo...

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Abstract

The invention is a combined detecting method of reducing complexity in mobile communication system, including the steps: processing the signal received by array antenna by sampling, A / D conversion, etc, and then sending the data to a base band processing part for base-band digital processing; according to TD-SCDMA time gap structure, a user training sequence in the middle of the time gap is known, and using the user training sequence to make channel estimation so as to compose a system matrix; according to the block characteristic of TD-SCDMA system matrix, inverting a small matrix composed of blocks on principal and minor diagonals to stand for the system matrix inverse, making slide filtration on the received data and thus able to find a corresponding transmitted data. It has not great quantity of calculation on the conduction of obtaining relatively good code error ratio, easy to implement in engineering.

Description

technical field [0001] The invention relates to a joint detection method for reducing complexity in the field of mobile communication, in particular to a fast solution method for the joint detection technology of a TD-SCDMA system. [0002] The present invention can also be extended to systems with intersymbol crosstalk and user space-time channels with periodic characteristics, such as TDMA systems and periodic spread spectrum CDMA systems. Background technique [0003] Code division multiple access system such as TD-SCDMA is an interference-limited system. The correlation of spreading codes between users leads to MAI (multiple access interference) between users. In the traditional receiving detection system, the Signals of other users are regarded as noise, and as the number of users increases, MAI becomes the main component of noise, thereby limiting the increase of system capacity. At the same time, the multipath effect of the infinite channel will cause inter-symbol in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/08H04J13/00
Inventor 周用芳
Owner ZTE CORP
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